shouldn’t webGLrenderer.compile do that automatically ?
the freeze is this
but haven’t experienced anything like this in drei, so im guessing it might be a bug somewhere, perhaps you’re rendering 100 frames at once by accident or something like that. a few console.logs will surely clear this up quick.
is that the best way or it’s better to do compute one shadow frame per in each req animation frame ?
imo everything has to execute on a single threaded cpu anyway and one RAF is better than two. i would execute it in the animation loop, one render per frame until it reaches 100 frames and then it stays idle.
in vanilla i guess you have some kind of class, and it should probably expose an update(frames) method which the user has to throw into the ticker function.
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Yeah, i’m planning to convert it into a class which extends object3d/Group like transformControls so you can just add it into the scene and expose lightOrigin , size of the plane , the shaderMaterial & methods to add mesh etc
then as you said i’ll expose a function “class.update()” which can just be left running in the animate loop and compute shadows on each frame when necessary , hope that resolves the issue
Current setup of using a timeout with promise to delay each forloop iteration seems dangerous
adding it to the raf loop did the trick !
performance is very stable and consistent now
since it’s on the render loop the compile stutter is taken care of in the first frame too 
https://vis-prime.github.io/progressive-shadows/
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@drcmda how does the blendWindow value work ? should it be same as the frame count ? is there any point in having it greater than or less than the frames value ?
blendwindow is for runtime shadows. you can have x seconds of frames, or infinite, and blend is how many it must accumulate before clearing, see:
but in hinsight runtime shadows seem useless and just cause complexity, i brought this over from prog LM but you would never want to have 8 lights causing a ton of extra renders and flickery shadows in a real project. i would recommend to completely remove it. and then yes, blend would be the same as frames.
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one version done for now
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